The Shift Bitcoin (BTC) debit card, which allows United States cryptocurrency exchange Coinbase users to spend BTC using a Visa debit card, is reportedly shutting down its operations. The development was posted to Reddit on Feb. 18, with the upload of an email purportedly from the Shift team. Shift, which launched in November 2015, was one of a steadily-increasing cohort of cryptocurrency debit cards, with multiple providers now issuing them in various countries. According to a screenshot of an email uploaded to Reddit and attributed to the Shift team, the BTC debit card program will be deactivated on April 11, …